if-evaluation within pgfmath (tikz 3.1.1)

Seems with tikz package version 3.1.1 evaluating if-expressions within tikzmath leads to attempts of carrying out an undefined control-sequence ifpgfmathfloatparseactive.

The example

errorcontextlines=10000
documentclass[a4paper]{article}
usepackage{tikz}
usetikzlibrary{math}
begin{document}

makeatletter
showtikz@math@if@@doifelse

showtikz@math@if@@doif
makeatother

defk{3}%
tikzmath{%
  if k < 3.14 then {{smaller};} else {{not smaller};};
}

end{document}

delivers the following output to the screen/console:

> tikz@math@if@@doifelse=macro:
->pgfmathparse {tikz@math@if@condition }ifpgfmathfloatparseactive pgfmathfl
oattofixed {pgfmathresult }fi let tikz@math@if@falseaction =tikz@math@coll
ected ifdim pgfmathresult pt=0ptrelax expandafter tikz@math expandafter {
tikz@math@if@falseaction }else expandafter tikz@math expandafter {tikz@ma
th@if@trueaction }fi tikz@math@parse .
l.8 showtikz@math@if@@doifelse
                                
? 
> tikz@math@if@@doif=macro:
->pgfmathparse {tikz@math@if@condition }ifpgfmathfloatparseactive pgfmathfl
oattofixed {pgfmathresult }fi ifdim pgfmathresult pt=0ptrelax else expan
dafter tikz@math expandafter {tikz@math@if@trueaction }fi tikz@math@parse 
.
l.10 showtikz@math@if@@doif
                             
? 
! Undefined control sequence.
tikz@math@if@@doifelse ...gfmathfloatparseactive 
                                                  pgfmathfloattofixed {pgf...

tikz@math@marshal ...er};} else {{not smaller};};
                                                   
tikz@math@stop ->
                  @
tikz@math@semicolon ->
                       ;
l.16 }
  
? 

The error-message after the show-outputs reveals that a command tikz@math@if@@doifelse is carried out which triggers complaints about a control-sequence whose name contains the phrase gfmathfloatparseactive not being defined.

The output of the second show (showtikz@math@if@@doifelse) reveals that this must be the control-sequence ifpgfmathfloatparseactive.

If you manually add a definition for ifpgfmathfloatparseactive and initialize it to iffalse, then problems seem to go away:

errorcontextlines=10000
documentclass[a4paper]{article}
usepackage{tikz}
usetikzlibrary{math}
newififpgfmathfloatparseactive
pgfmathfloatparseactivefalse
begin{document}
    
defk{3}%
tikzmath{%
  if k < 3.14 then {{smaller};} else {{not smaller};};
}

end{document}

If you initialize ifpgfmathfloatparseactive to iftrue and don’t convert k to a floating-point-number

errorcontextlines=10000
documentclass[a4paper]{article}
usepackage{tikz}
usetikzlibrary{math}
newififpgfmathfloatparseactive
pgfmathfloatparseactivetrue
begin{document}
    
defk{3}%
tikzmath{%
  if k < 3.14 then {{smaller};} else {{not smaller};};
}

end{document}

, you get

! Package PGF Math Error: Sorry, an internal routine of the floating point unit
 got an ill-formatted floating point number `1'. The unreadable part was near '
1'..

See the PGF Math package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
GenericError  ...        

If you initialize ifpgfmathfloatparseactive to iftrue and do convert k to a floating-point-number,

errorcontextlines=10000
documentclass[a4paper]{article}
usepackage{tikz}
usetikzlibrary{math}
newififpgfmathfloatparseactive
pgfmathfloatparseactivetrue
begin{document}
    
defk{3}%
pgfmathfloatparsenumber{k}%
letk=pgfmathresult
pgfmathfloattofixed{k}%
letk=pgfmathresult

tikzmath{%
  if k < 3.14 then {{smaller};} else {{not smaller};};
}

end{document}

then you get instead

! Package PGF Math Error: Unknown operator `Y' or `Y3' (in ' 1Y3.0e0]< 3.14 ').


See the PGF Math package documentation for explanation.
Type  H <return>  for immediate help.

If again you convert to fixed-point

errorcontextlines=10000
documentclass[a4paper]{article}
usepackage{tikz}
usetikzlibrary{math}
newififpgfmathfloatparseactive
pgfmathfloatparseactivetrue
begin{document}
    
defk{3}%
pgfmathfloatparsenumber{k}%
letk=pgfmathresult
pgfmathfloattofixed{k}%
letk=pgfmathresult

tikzmath{%
  if k < 3.14 then {{smaller};} else {{not smaller};};
}

end{document}

, then you get

! Package PGF Math Error: Sorry, an internal routine of the floating point unit
 got an ill-formatted floating point number `1'. The unreadable part was near '
1'..

See the PGF Math package documentation for explanation.
Type  H <return>  for immediate help.
 ...                                              
                                                  
GenericError  ...              

My questions are:

• Are bugs fixed with later releases of the tikz-package?
• How to specify numbers in order to achieve that evaluating if-expressions within tikzmath works out?